Sand-sifting machine



{No Model.)

J. J. CARR.

SAND SIPTING MACHINE.

N0. 368,872. Patented Aug. 23, 1887.

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UNIT D STATES PATENT OFFICE.

JOSEPH J. CARR, OF WILKES-BARRE, ASSIGNOR on ONE-HALF TO DOMINIC F. SWEENEY, OF HAZLETON, PENNSYLVANIA.

SAND-SlFTlNG MACHINE- SPECIFICATION forming part-of Letters Patent No. 368,872, dated August 23, 1887. Application filed February 12, 1887. Serial No. 227,401. (No model.)

To all whom it may concern;

Be it known that I, JOSEPH J. CARR, of Wilkes-Barre, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Sand-sifting Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to sand -'sifting machines.

The object of this invention is to produce a sand-sifting device of such construction that the coarser particles passing therein may be quickly separated from the finer, and one in which the screen-cloth maybe readily changed for one of different mesh when desired.

A further object of my invention is to pro- Vide a sand-sifting device in which the sieve is made removable to exchange it for coarser or finer meshed sieves, or to remove a worn-out sieve and replace it with a new or perfect one.

With these objects in view my invention consists in certain features of construction and combination of parts, that will be hereinafter explained, and pointed out in the claims.

Referring to the drawings, Figure l is an end elevation of the device with end wall broken away to show the interior details. Fig. 2 is a vertical longitudinal section.

A represents the frame of the sifter or sandscreen, it being made rectangular in form, with stout end portions, A, held in connection firmly by longitudinalbars lewhich extend from end to end,the attachment of these parts being made with screw-bolts or other suitable method. I prefer to make these end pieces, A, of castiron; but wood or sheet plate metal may be substituted, if desired.

J ournal-boxes b b are provided at a proper point upon the end pieces, A, these boxes b I) being of suitable diameter to receive the j ournaled ends of the horizontal shaft D. Upon each end piece ofthe-frame A the curved flanges g are formed concentric with the bore of the j ournal-boxes b b, and are made to extend inwardly a proper distance to support the edge of the screen wire-cloth C, which is placed longi- 1 5o tndinally in the frame A.

The shaftD is preferablyfurnished with eight extend longitudinally,to have bearing-contact with the inner surface of the screen to agitate the sand placed in the interior of this screen wire receptacle.

The end D of the shaft D, which is made to project beyond the end piece, A, of the frame of the device, is furnished with a crank, M, to rotate the shaft D; or a pulley may be fixed to the shaft to give rotary motion to it.

A hopper, H, is placed upon the top of the frame A to afford access to the interior of the screen-chamber. The wire fabric of which the screen is composed is extended upwardly at the sides of the frame, and the ends of this screen are attached securely to the rollers R, which are held in position above the sides of the frame A by the upwardly-extended arms R, which areaffixed to the frame end pieces, A.

The upper ends of the arms R are provided with boxes to support the rollers B. At each end of the rollers It the; ratchet-wheels R are secured. The pawls R that-are made to engage the wheels E have their pivoted ends attached to the ends of the hopper H. The j ournaled shafts that are inserted in the rollers R are extended at one of their ends, and these ends that project outside the boxes on the arms R are preferably squared to receive a crankhandle, by which the rollers are rotated in their bearings to take up the slack material of the screen fabric 0 and hold this screen in stable position for the operation of screening sand or other similar material.

Upon two of the armsB the pendent arms L are suspended,t0 swing and have bearing contact against the arms, to which they are pivoted, when the shaft is rotated in the direction indicated by the arrow in Fig. 1.

The pivoted arms L have a plate or scraper rigidly attached to their faces,-which is intended to lift stones or other refuse material to a level with the door M, that is hinged to the upper portion of the case or shell of the device, to permit access to the interior of the screening-chamber for the removal of this refuse, that is sepa rated from the sand and retained in thescreenchamber.

\Vhen in operation the shaft D is revolved, the yielding bars I will agitate the sand placed in the interior of the screen wire chamber and rapidly force the same through the meshes of the screen. This operation may be continued as long as desired, the sifted sand being removed from the base of the screening device as it falls below the screen, aproper opening being provided to afford access to the space below the sieve (J.

When it is desired to remove the wire fabric to replace it if it is injured or worn out, the ends of this screen are disconnected from the rollers to which they are connected. This will release the sieve stuff. It can be withdrawn readily and a new or more perfect sieve sub stituted. It is evident that screens having coarse or fine meshes can be substituted or exchanged to permit different qualities of sand or other similar substances to be sifted in a perfect manner with rapidity and comparative ease.

Slight changes might be made in the constructive details of this sieve or screen without exceeding the scope or violation of the spirit of my invention; hence I do not wish to limit myself to exact forms shown.

Having fully described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. In a sand-screening machine, the combination, with the frame ends, the curved flanges secured thereto, and suitable rollers, of a wirefabric screen secured to the said rollers to permit it to be tightened or loosened when desired, substantially as set forth.

2. The combination, with a screen frame, rolle rs mounted therein, and a wire screen removably secured to said rollers, of a rotary shaft, radial arms extending therefrom, and scraper-bars cushioned in the ends ofsaid arms, substantially as set forth.

3. The combination, with a screen frame, rollers mounted therein, and a wire screen removably secured to said rollers, of a rotary shaft, radial arms extending therefrom,scraper-bars cushioned in the end of said arms, and a scraper-bladepivoted to two or more of these arms, substantially as set forth.

4. The combination, with the end pieces of a screen-frame, curved flanges, and the screen carried thereon,ofa shaft, journal-boxes there for secured to the end of the frame, radial arms attached to the shaft, and horizontal bars cushioned in the outer ends of these radial arms, substantially as set forth.

5. The combination, with a screen frame, rollers, and ratchet-gear with locking-pawls to secure the gear, of a screen wire fabric attached to the rollers, a center shaft, radial arms, and horizontal yielding bars attached to the outer ends of the radial arms, substantially as set forth.

6. Thecombinatiomwith theframe,asereen,

rollers to tighten the screen in place, ratchetgear to secure the rollers, and pawls to engage the ratchet-gear, of a hopper, a center shaft, radial arms, and scraper'blades cushioned in these arms, substantially as set forth. 7. The combination, with a screen having a curved interior surface, a center shaft, radial arms, and yielding bars secured to the radial arms to engage the interior screen-surface, of a door hinged to the supporting-frame of the screen and a pivoted scraper to lift waste material to a level with the hinged door, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOSEPH J. CARR.

\Vitnesses:

EMMETT D. NIcnoLs, H. D. PATTON. 

